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P. 'W. GATES.

STONE BREAKER AND ORE GRUSHBRQ No. 269,193. Patented Dec. 19, 1882.

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UNITED STATES FFICEJ.

PHILETUS \V. GATES, OF CHIOAGOQILLINOIS.

' SPECIFiCATION-forming part of Letters Patent No. 269,193, dated December 19, 1882.

Application filed November 19, 1881. (No model.)

To all whom it may concern:

Be it known that I, PHILETUS W. GATES, a citizen. of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Stone-Breakers and Ore- Orushers, of which the following is a specification.

The nature of my invention consists in the combination, with the upright hollow flanged frame, gyrating crusher-shaft, eccentric bearing, and gear-wheel on upper end of the same, of a detachable base-plate provided with a compound step-box-that is, a primary internally-shouldered oil step-boxcast with it, and a strong flanged auxiliary box set and suspended within the primary box and properly keyed or fastened thereto, whereby the wear and consequent destruction of the said plate and its primary step-box is removed from the heavy and expensive casting forming the baseplate and primary step-box and thrown upon the auxiliarycylindrical removable tube, which is set down into the oil step-box and sustained by a flange, and held in position by a key or suitable means. By my invention the heavy and costly base-plate of the frame can be kept undisturbed in its place when the metal surrounding the bore of the oil step-box has become so worn away as to render the operation of the crusher-shaft imperfect and the repair of the machine absolutely necessary, for by withdrawing the worn cylindrical tube and supplying its place with another unworn tube the machine will be restored to its working condition, and thus time and labor saved and loss avoided.

In the accompanying drawings, Figure l is atop view of the improved base-plate detached from the framing and having the oil step-box and cylindrical flanged tube constructed upon it; and Fig. 2 is a broken section of a portion of a stone-breaker and ore-crusher patented by P. WV. Gates, June 28, 188i, and showing my improvements applied thereto.

The shaft A, which is used to gyrate a conical crusher-head, the eccentric bearing-box B, which gyrates the shaft, and the gearing G D for revolving the eccentric bearing-box, are all made in the usual manner and operate the same as in the aforesaid patent of P. WV. Gates, the shaft being made adjustable up and down by means of an adjustable step-block, and oil base-plateF an oilstep-box, F G, is provided,

the portion F being cast upon the plate, and in the wall ofpart F ofthis box oil-channels I) are cast, as usual.

Thus far the machine is not claimed by me, except the part G, and so far as its oil stepbox is changed in construction for the application to it and the plate on which it is formed of my invention, which I will now describe. I cast the portion F of the oil step-box with a wall of less thickness than usual, butwith the oil-circulation channels bdown through it. A shoulder, c, is also formed on the upper edge of the part F of the box in addition to the usual oil-guard flange, d. A strong cylindrical tube, as at G, having a flange, g, at its upper edge, is constructed of carbon-bronze metal or othersuitable metal, and this is introduced into the step-box with its flange resting upon the shoulder 0, as shown. This tube does not extend down to the bottom portion, 7L, ofthe part F of the step-box, butis so formed as to allow the oil to flow through the channels I), as illustrated by the arrows. The thickness of the tube G should be sut'ticient to compensate for the reduction made in the thickness of the walls of the part F of the oil step-box, and it should also be sufficient to give great strength to the tube, as immense strain and wear uecessarily are thrown upon the tube by the pressure of the eccentric bearing B when the ma.- chine is crushing ore or breaking stone. The tube must not simply serve as a bushing, but it must be capable of withstanding the great and heavy work required of a machine for crushing ore and breaking stone. In other words,

stitute a bearing in conjunction with the part F of the oil step-box and plate F. To fasten the cylindrical tube in place, a key or other strong fastening, m, is'provided and set down between the oil step-box and the said tube, as shown.

With this device great saving is effected, for when the bearing-cylinder G is worn out it can be removed without disturbing the plate F and part F of the step-box, and its place the cylindrical tube with its flange must consupplied by a new one. The time and labor usually required under the usual construction, saying nothing about the expense for anew plate and step-box, to take the machine apart and supply the place of the worn-out step-box and plate with a new step-box and base-plate are very considerable, and these are also saved by my improvement.

It is proper to state that, instead of making the step-box with a seat for a key-pin, the cylindrical part G might be made with square or flat external surfaces, and similar matching surfaces be formed on the inner surface of the walls of the step-box I With such construction the cylinder G will be held from turning.

I do not claim broadly lining a bearing with a bushing or wearing metal; but

What I do claim as my invention, and desire to secure by Letters Patent, is-

In a stone breaker or crusher, the combination, with the upright hollow frame G, gyrating crusher-shaft A, eccentric bearing B, and gear-wheel D, of the detachable base-plate F, having its oil step-box constructed of the parts F and G, the part F being internally shouldered and cast with the plate F, and the part G" being provided with a flange and suspended within part F, and made separate from both the plate F and part F, and confined in position by a suitable fastening, all as and for the purpose herein described.

PHILETUS W. GATES.

Witnesses J. L. FARGO, GEORGE W. Guns. 

